Nióbia sintética modificada como catalisador na oxidação de corante orgânico: utilização de H2O2 e O2 atmosférico como oxidantes

Química Nova

Kele T. G. Carvalho¹  Adilson C. Silva¹  Luiz C. A. Oliveira¹  Maraisa Gonçalves¹  Zuy M. Magriotis¹ 

[1] ,Universidade Federal de Lavras Departamento de Química Lavras MG ,Brasil

关键词: niobia;    ESI-MS;    oxidation process;   

DOI  :  10.1590/S0100-40422009000600002

来源: SciELO

【 摘 要 】

In this work synthetic niobia was used to promote the oxidation of methylene blue dye in aqueous medium. The niobia was characterized by N2 adsorption/desorption, XRD and TG measurements. The presence of reactive species on the niobia surface strongly increased the oxidation rate of the methylene blue dye. The reaction mechanism was studied by ESI-MS suggesting that the oxidation of the organic dye involve oxidizing species generated mainly after previous treatment with H2O2. It can be observed that the catalyst is a good material in the activation of gas (atmospheric oxygen) or liquid (hydrogen peroxide) oxidant agent with a total discoloration of the dye solution after only 1 h of reaction.

【 授权许可】

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